c4 Flashcards
as defined in medical dictionaries, involves an orderly and organized increase in the sum of all components of the organism. The process entails the replication of all cellular structures, organelles, and components.
growth
is concerned with the increase in the number of cells and not an increase in the size of the organism.
Microbial growth
is composed of thousands of cells
bacterial colony
makes up the structural backbone or skeleton of all organic molecules.
carbon
are microorganisms that utilize inorganic compounds (e.g., carbon dioxide) and inorganic salts as their sole carbon source.
autotrophs
are organisms that make use of organic substances such as sugars or glucose as their carbon source.
heterotrophs
The bacterial cell is composed mainly of water. It serves as the medium from which bacteria acquire their nutrients.
Moisture/Water
Microorganisms that utilize molecular oxygen for energy production are referred to as
aerobes
are organisms that strictly require oxygen for growth (e.g., Mycobacterium tuberculosis).
Strict aerobes or obligate aerobes
Microbes that cannot survive in the presence of oxygen are called
obligate anaerobes.
There are organisms that can grow and survive under both aerobic and anaerobic conditions. These are called
facultative organism
Some organisms are able to grow at low oxygen tension but their rate of growth is diminished, and they are called
microaerophiles
There are some organisms though that may require the addition of carbon dioxide to enhance their growth-they are called
capnophiles
grow best at temperatures higher than 40 °C; (2)
thermophiles
